The Grey-rumped Treeswift, Hemiprocne longipennis, is the only resident treeswift in Singapore. They were frequently seen hawking for insects over the Palm Valley of the Botanic Gardens up to a few years back. In May 2013, a pair was first seen nesting at Bishan Park (S.Ng in litt 2015). Since then, they have been reported using the low trees along the bicycle path to nest on a regular basis. Shirley Ng once counted four nestings at the park but only one juvenile fledged. She thinks that the low success rate could be due to the fragility of the nest cup, predation by crows and sterile eggs.
This year another pair was seen feeding a juvenile at its small cup shaped nest not too high above ground. The nest was on an Aantoi or Cotton Fruit Tree , Sandoricum koetjape, (S. Ng). This juvenile appeared to be well over a month old. There was another older juvenile around, most likely from an earlier nesting. We hope to see more of these tree swifts making a home here at the park.